Ecumenical Patriarch Sergios I

Ecumenical Patriarch Sergios I (575-9 December 638) was the Ecumenical Patriarch of Constantinople from 610 to 638, succeeding Ecumenical Patriarch Thomas I and preceding Ecumenical Patriarch Pyrros I.

Biography
Sergios was born in 575, and he became the Ecumenical Patriarch of Constantinople in 610. Sergios practiced Monothelitism, a branch of Orthodox Christianity, and he gained support from the Emperors of the Byzantine Empire. During his tenure as patriarch, Christianity was challenged by the rise of Islam in 623 AD, and by his death in 638 the Arabs had conquered Syria-Palestine.